Small Engines (Lawn Mowers, etc.)/Over rev lawn mower

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Question
Hi my lawn mower recently has started to over rev, and wont shut off to the point it starts to back fire, and still wont stop, the controls do nothing. after all this it might cut out or fuel is turned off and it winds down. After when mowing again the revs stay very low, and all of a sudden it starts to over rev again and same back fires and is uncontrollable..
my mower is a Victa mustang 2 stroke.

Answer
Has the carburetor been cleaned?  I'd start by removing, dis-assembling and cleaning the carburetor with compressed air from an air compressor.  Blow compressed air through all the carb orifices.  I would also check all the carburetor linkages and make sure they are clean, free of grease, dirt/debris, and move easy without any binding.

Let me know if cleaning the carb helps.

Eric

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones

Expertise

Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.

Experience

Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

Education/Credentials
MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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